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High-power coaxial structure over-mode surface wave oscillator and terahertz wave generating method

A coaxial structure, oscillator technology, applied in impedance networks, discharge tubes, electrical components, etc., can solve problems such as device efficiency decline, electromagnetic wave radiation termination, pulse shortening, etc., to achieve convenient mode conversion, high output power, mode high purity effect

Active Publication Date: 2014-01-15
NORTHWEST INST OF NUCLEAR TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As the size of the device shrinks, the internal power density continues to increase, and the field strength increases accordingly. However, the excessively strong field strength in the device has a destructive effect, resulting in a serious decline in device efficiency, and even the termination of electromagnetic wave radiation, resulting in pulse shortening.

Method used

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  • High-power coaxial structure over-mode surface wave oscillator and terahertz wave generating method
  • High-power coaxial structure over-mode surface wave oscillator and terahertz wave generating method
  • High-power coaxial structure over-mode surface wave oscillator and terahertz wave generating method

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Embodiment Construction

[0030] The cross-sectional schematic diagram of the present invention is asfigure 1 , figure 1 It is a structural schematic diagram of an embodiment of a 0.14THz coaxial overmodulated surface wave oscillator adopting the design scheme of the present invention; it consists of a foil-free diode 1, an injection cavity 2, a cut-off neck outer cylinder 3, and an overmodulated coaxial slow wave structure outer cylinder 4 , Transition waveguide section inner cylinder 5, Output waveguide outer cylinder 6, Cut-off neck inner cylinder 7, Overmolded coaxial slow wave structure inner cylinder 8, Coaxial drift waveguide inner cylinder 9, Transition waveguide inner cylinder 10, Output waveguide inner cylinder 11 , Coaxial excursion waveguide outer cylinder 12 is composed.

[0031] Foil-free diode 1 is located at the forefront of the structure and is used to generate annular high-current relativistic electron beams; injection cavity 2, cut-off neck outer cylinder 3, over-molded coaxial slow ...

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Abstract

The invention discloses an axisymmetric-structure high-power coaxial over-mode surface wave oscillator which uses electromagnetic wave radiation of the terahertz wave band generated through wave-beam interaction as the basic working principle, according to high-current relativity theory electron beams and an over-mode coaxial slow wave structure, strong wave-beam interaction happens, and high-power terahertz waves are generated. The coaxial over-mode surface wave oscillator comprises a non-foil diode, the over-mode coaxial slow wave structure, a transitional wave guiding part and an output wave guiding part of a coaxial structure. The working mode of the over-mode surface wave oscillator in a wave-beam interaction zone is a TM01 mode, by mode converting of the transitional wave guiding part, transmission is carried out at an output wave guiding end of the surface wave oscillator in a TEM mode, the 0.14THz over-mode surface wave oscillator is designed through the structure, and the peak power of an output port can reach 115MW. The over-mode surface wave oscillator is suitable for generating the high-power electromagnetic waves in the terahertz wave band.

Description

technical field [0001] The invention belongs to the design scheme of high-power terahertz source, and specifically relates to a method for generating terahertz band (terahertz, Terahertz, 1THz=10 12 Hz) axisymmetric high-power coaxial structure overmode surface wave oscillator for electromagnetic waves. Background technique [0002] Terahertz (THz) waves refer to electromagnetic waves with a frequency in the range of 0.1 to 10 THz. Since this band has the characteristics of both submillimeter wave and infrared visible light, it combines the advantages of submillimeter wave and infrared visible light, especially the moderate beam width, wide system bandwidth and large Doppler frequency shift characteristics. It is very beneficial to target detection and identification and interference countermeasures. These characteristics provide great potential for the application of terahertz waves in the military, which has attracted great attention from many countries in the world, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H9/145H01J25/00
Inventor 陈再高王建国王光强李爽王玥
Owner NORTHWEST INST OF NUCLEAR TECH
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